| Pine Tree Walk Limited | Real estate | 2011 |
| Pines Bookkeeping Ltd | Professional & scientific | 2021 |
| Pink Pelican Ltd | Construction | 2021 |
| Pink PUB Oak Limited | Hospitality | 2025 |
| Pinnacle Plastering & Rendering Ltd | Construction | 2021 |
| Pipette Medic Services Ltd | Manufacturing | 2021 |
| Pitch UP Weddings & Functions Ltd | Wholesale & retail | 2024 |
| Pitstop Recovery Ltd | Wholesale & retail | 2013 |
| PJI GM Ltd | Administrative & support | 2019 |
| Plak Clinic Injuries Ltd | Health & social care | 2026 |
| Plan B Careers Ltd | Professional & scientific | 2024 |
| Plant Planet Ltd | Professional & scientific | 2025 |
| Platinum Accounting Limited | Professional & scientific | 2017 |
| Platinum Accounting Services Ltd | Professional & scientific | 2016 |
| Platinum Gardens Management Company Limited | Households | 2022 |
| Platypus Woodwork's Limited | Construction | 2025 |
| Plaza Cinemas Limited | Arts & recreation | 2011 |
| Plumbford Plumbing Ltd | Construction | 2026 |
| Plumbing & Property Services Ltd | Construction | 2015 |
| PLV Fitness Limited | Other services | 2025 |
| PO21 Properties Ltd | Real estate | 2020 |
| PO4 Club Ltd | Professional & scientific | 2025 |
| POD Portables Ltd | Administrative & support | 2025 |
| Polaris Outdoor Ltd | Wholesale & retail | 2020 |
| Poleks Ltd | Construction | 2025 |
| Polestar Cooling Limited | Manufacturing | 2003 |
| Polestar Refrigeration and Electrical Ltd | Manufacturing | 1995 |
| Polestar Southern Ltd | Manufacturing | 2025 |
| Polkadot Wessex Limited | Wholesale & retail | 2023 |
| Pollards Nurseries Limited | Financial services | 2017 |
| Polruan Flats Management (Bognor Regis) Limited | Households | 1975 |
| Polygongoozler Limited | Arts & recreation | 2023 |
| Poole Accounting Services Limited | Professional & scientific | 1999 |
| Popjax Limited | Wholesale & retail | 2018 |
| Poppins Restaurateurs Association Limited | Other services | 1979 |
| Porter Scaffolding Limited | Construction | 2014 |
| Portsmouth Properties Limited | Real estate | 2026 |
| Portsmouth Tattoo Fest Limited | Arts & recreation | 2017 |
| Posbrook Holdings Limited | Professional & scientific | 2018 |
| Posh Paws Nails & Beauty Ltd | Wholesale & retail | 2012 |
| Positive Training & Consultancy Ltd | Professional & scientific | 2025 |
| Post Newspapers Ltd | Information & communication | 2016 |
| Posted Sweets Ltd | Wholesale & retail | 2020 |
| Poucan Ltd | Financial services | 2024 |
| Power Letting Limited | Real estate | 2022 |
| Power Solutions 18 Limited | Hospitality | 2024 |
| Power to Sail Limited | Transport & logistics | 2006 |
| Power UP Talent Ltd | Administrative & support | 2024 |
| Precisionlink Ltd | Wholesale & retail | 2026 |
| Prelanglen Limited | Real estate | 1975 |
| Premier Wishfield Ltd | Wholesale & retail | 2026 |
| Premium Timbers Limited | Manufacturing | 2014 |
| Premtec Business Solutions Limited | Information & communication | 2005 |
| Prescription Footwear Associates Limited | Manufacturing | 1996 |
| Prestige Backdoor Limited | Wholesale & retail | 2022 |
| Prestige Stone Works Limited | Manufacturing | 2019 |
| Primary Care Research Alliance Limited | Information & communication | 2025 |
| Prime Living UK (Contracts) Ltd | Construction | 2014 |
| Primo Bar & Grill Limited | Hospitality | 2026 |
| Primo Catering Ltd | Hospitality | 2024 |
| Priority Heating & GAS Services Ltd | Construction | 2018 |
| Private Detective Ltd | Administrative & support | 2025 |
| PRN Homecare Ltd | Health & social care | 2006 |
| Pro Clean Services 25 Ltd | Administrative & support | 2025 |
| Pro-Solutions Sussex Limited | Construction | 2016 |
| Proctor Works Limited | Real estate | 2018 |
| Profound HR Ltd | Professional & scientific | 2025 |
| Profound Training Ltd | Education | 2021 |
| Progress BK Ltd | Real estate | 2017 |
| Progressive Energy Partners Ltd | Mining & quarrying | 2016 |
| Project X SOS Ltd | Construction | 2020 |
| Projexe Ltd | Information & communication | 2015 |
| Proline Cars Limited | Wholesale & retail | 2023 |
| Promocja Market Ltd | Wholesale & retail | 2024 |
| Propensify Limited | Administrative & support | 2021 |
| Property and Business Transfers (Southern) Limited | Real estate | 1973 |
| Property Consultant Angelika Cropley Limited | Real estate | 2021 |
| Property Match Ltd | Information & communication | 2025 |
| Pros Local Services Ltd | Professional & scientific | 2023 |
| Prova Surveying Limited | Professional & scientific | 2009 |
| Pulborough Builders Limited | Construction | 2016 |
| Pulse Design Limited | Wholesale & retail | 1999 |
| Pumpkin Property Lettings Limited | Real estate | 2015 |
| Purley Down Holdings Ltd | Financial services | 2024 |
| Purple Goat Ltd | Construction | 2025 |
| Purpose Design Ltd | Manufacturing | 2023 |
| PVL Garage Ltd | Wholesale & retail | 2024 |
| PWC Tech Ltd | Information & communication | 2018 |
| Pzazz Properties Limited | Real estate | 2018 |
| Qaman.Com Quality Management Services Limited | Professional & scientific | 2002 |
| QS Link Ltd | Construction | 2009 |
| Quality Care Direct Limited | | 2009 |
| Queen's Court (Bognor Regis) Management Company Limited | Households | 2021 |
| Queens Recovery Ltd | Transport & logistics | 2025 |
| Quercus Landscape & Garden Design Limited | Administrative & support | 2018 |
| Quercus Nursery Limited | Wholesale & retail | 2017 |
| Quercus Project Consultancy Limited | Professional & scientific | 2024 |
| Questmark Investments Limited | Real estate | 1999 |
| Quintesse Limited | Professional & scientific | 2014 |
| Quinton Fields Management Limited | Households | 2006 |